import { constantRoutes } from '@/router'
import Layout from '@/layout/index'
import ParentView from '@/components/ParentView';

const permission = {
  state: {
    routes: [],
    addRoutes: [],
    defaultRoutes: [],
    topbarRouters: [],
    sidebarRouters: []
  },
  mutations: {
    SET_ROUTES: (state, routes) => {
      state.addRoutes = routes
      state.routes = constantRoutes.concat(routes)
    },
    SET_DEFAULT_ROUTES: (state, routes) => {
      state.defaultRoutes = constantRoutes.concat(routes)
    },
    SET_TOPBAR_ROUTES: (state, routes) => {
      // 顶部导航菜单默认添加统计报表栏指向首页
      const index = [{
        path: 'index',
        meta: { title: '统计报表', icon: 'dashboard'}
      }]
      state.topbarRouters = routes.concat(index);
    },
    SET_SIDEBAR_ROUTERS: (state, routes) => {
      state.sidebarRouters = routes
    },
  },
  actions: {
    // 生成路由
    GenerateRoutes({ commit }) {
      return new Promise(resolve => {
        // 向后端请求路由数据
        let resData = [
          {
            "name": "test",
            "path": "/test",
            "hidden": false,
            "redirect": "noRedirect",
            "component": "Layout",
            "alwaysShow": true,
            "meta": {
                "title": "承保管理",
                // "icon": "underwriting",
                "noCache": false
            },
            "children": [
              {
                "name": "Test",
                "path": "test",
                "hidden": false,
                "component": "test/test",
                "meta": {
                    "title": "测试",
                    // "icon": "wenjian",
                    "noCache": false
                }
            },
            ]
          }
        ];
        resData = resData.map(item => {
          if(item.hidden){
            return item;
          }
          if(!item.hidden && !item.children){
            return item;
          }
          if(!item.hidden && item.children && item.children.length == 0){
            item.hidden = true;
            return item;
          }
          if(!item.hidden && item.children && item.children.length > 0){
            item.hidden = checkChildren(item.children);
          }
          return item;
        });
        const sdata = JSON.parse(JSON.stringify(resData))
        const rdata = JSON.parse(JSON.stringify(resData))
        const sidebarRoutes = filterAsyncRouter(sdata)
       
        const rewriteRoutes = filterAsyncRouter(rdata, false, true)
        rewriteRoutes.push({ path: '*', redirect: '/404', hidden: true })
        console.log('11111', rewriteRoutes)
        commit('SET_ROUTES', rewriteRoutes)
        commit('SET_SIDEBAR_ROUTERS', constantRoutes.concat(sidebarRoutes))
        commit('SET_DEFAULT_ROUTES', sidebarRoutes)
        commit('SET_TOPBAR_ROUTES', sidebarRoutes)
        
        resolve(rewriteRoutes)
      })
    }
  }
}
// 遍历传来的子路由，当子路由全都不显示时，父路由也不可显示
function checkChildren(data){
  let hidden = true;
  data = data.map(item => {
    if(item.hidden){
      return item;
    }
    if(!item.hidden && !item.children){
      return item;
    }
    if(!item.hidden && item.children && item.children.length == 0){
      item.hidden = true;
      return item;
    }
    if(!item.hidden && item.children && item.children.length > 0){
      item.hidden = checkChildren(item.children);
    }
    return item;
  })
  data.forEach(item => {
    if(!item.hidden){
      hidden = false;
    }
  })
  return hidden;
}
// 遍历后台传来的路由字符串，转换为组件对象
function filterAsyncRouter(asyncRouterMap, lastRouter = false, type = false) {
  return asyncRouterMap.filter(route => {
    if (type && route.children) {
      route.children = filterChildren(route.children)
    }
    if (route.component) {
      // Layout ParentView 组件特殊处理
      if (route.component === 'Layout') {
        route.component = Layout
      } else if (route.component === 'ParentView') {
        route.component = ParentView
      } else {
        route.component = loadView(route.component)
      }
    }
    if (route.children != null && route.children && route.children.length) {
      route.children = filterAsyncRouter(route.children, route, type)
    } else {
      delete route['children']
      delete route['redirect']
    }
    return true
  })
}

function filterChildren(childrenMap, lastRouter = false) {
  var children = []
  childrenMap.forEach((el, index) => {
    if (el.children && el.children.length) {
      if (el.component === 'ParentView') {
        el.children.forEach(c => {
          c.path = el.path + '/' + c.path
          if (c.children && c.children.length) {
            children = children.concat(filterChildren(c.children, c))
            return
          }
          children.push(c)
        })
        return
      }
    }
    if (lastRouter) {
      el.path = lastRouter.path + '/' + el.path
    }
    children = children.concat(el)
  })
  return children
}

export const loadView = (view) => { // 路由懒加载
  return (resolve) => require([`@/views/${view}`], resolve)
}

export default permission
